CVE-2026-12307

CVE-2026-12307 is a memory-safety vulnerability in Mozilla Firefox and Thunderbird that was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. Reports from multiple feeds (NVD, Debian, Fedora, OSV) confirm a single fixed public CU for Firefox/Thunderbird. The Debia...

CVE-2026-2790

CVE-2026-2790 is a same-origin policy bypass in the Networking: JAR component affecting Firefox and Thunderbird. Connected sources confirm the issue and its remediation: Firefox versions 148 and ESR 140.8, as well as Thunderbird 148 and 140.8, include the fix. Astra Linux bulletin also cites the ...

CVE-2026-2805

CVE-2026-2805 describes an Invalid pointer in the DOM: Core & HTML component affecting Mozilla Firefox and Mozilla Thunderbird. The issue originates from a pointer problem in the DOM Core & HTML, with the vulnerability fixed in version Firefox 148 and Thunderbird 148 . Public CVSS details (CVSS v...

CVE-2026-4686

CVE-2026-4686 targets the Graphics: Canvas2D component. The root cause is incorrect boundary conditions, exposed in Firefox versions prior to 149, Firefox ESR prior to 115.34, and Firefox ESR prior to 140.9. The connected sources confirm the affected products and versions without detailing exploi...

CVE-2026-4704

Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704) affects Firefox/Firefox ESR and Thunderbird prior to fixed versions. Multiple documents confirm the issue and indicate fixes in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. The vulnerability is associa...

CVE-2026-4729

CVE-2026-4729 affects Firefox 148 and Thunderbird 148, with memory-safety bugs that could lead to memory corruption and potential arbitrary-code execution. The issues were fixed in Firefox 149 and Thunderbird 149. Mitigation: upgrade to the fixed versions (Firefox 149 / Thunderbird 149). Exploita...

CVE-2026-74989

CVE-2026-74989 affects Thunderbird 153 and Firefox 153 , encompassing internally discovered bugs that exhibited evidence of memory corruption or other security-relevant defects. Mozilla presumes that with sufficient effort, some of these bugs could have been exploited to achieve remote code execu...

CVE-2026-8966

CVE-2026-8966 affects Mozilla Thunderbird (earlier than 151.0) and concerns information disclosure in the IP Protection component. Multiple connected sources corroborate the impact as information disclosure, with the vulnerability fixed in Thunderbird 151 (and Firefox 151 per the initial entry). ...

CVE-2008-2014

CVE-2008-2014 affects Mozilla Firefox 3.0 beta 5. The vulnerability allows a remote attacker to cause a denial of service (application crash) by sending JavaScript that calls document.write in an infinite loop. Exploitation details and exact impact are described in the NVD entry; other connected ...

CVE-2025-10859

CVE-2025-10859 affects Mozilla Firefox for iOS (pre-143.1). The issue is an information disclosure caused by cookie storage for non-HTML temporary documents being shared with normal browsing content, allowing data from private/incognito tabs to be exposed even after all tabs are closed. Impact de...

CVE-2025-11152

CVE-2025-11152: Firefox's Graphics: Canvas2D contains an integer overflow that enables sandbox escape in versions prior to 143.0.3. The affected component and root cause are described across multiple sources; exploitation status is not detailed in the provided documents; no explicit remediation i...

CVE-2025-14329

CVE-2025-14329 is a Privilege escalation in the Netmonitor component affecting Firefox/Firefox ESR and Thunderbird (per connected advisories). Affected: Firefox < 146 and Firefox ESR

CVE-2026-0890

The CVE-2026-0890 entry describes a spoofing issue in the DOM: Copy & Paste and Drag & Drop component affecting Mozilla products. Affected products/components: Firefox (versions before 147) and Firefox ESR (before 140.7); Thunderbird (before 147) and Thunderbird (before 140.7). Root cause and imp...

CVE-2026-0891

CVE-2026-0891 corresponds to memory-safety bugs in Mozilla products: Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146. The issue is described as memory corruption in certain bugs that could, with sufficient effort, be exploited to execute arbitrary code. Affected products...

CVE-2026-12301

CVE-2026-12301 is a memory-safety vulnerability that is fixed in Firefox 152 and Thunderbird 152. The Connected sources consistently describe the issue as a memory-safety bug resolved by upgrading to Firefox 152/Thunderbird 152; no exploitation details are provided in the documents. Affected comp...

CVE-2026-16395

CVE-2026-16395 : Integer overflow in the Audio/Video component of Firefox. root cause: integer overflow within the media handling path. Impact per sources: high confidentiality, integrity, and availability should be considered given the CVSS vector indicates network attack vector with no user int...

CVE-2026-2784

A vulnerability CVE-2026-2784 is a mitigation bypass in the DOM: Security component affecting Mozilla Firefox and Thunderbird. The issue was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. The connected sources (Astra Linux bulletin and Amazon Linux advisories) co...

CVE-2026-4721

CVE-2026-4721 refers to memory-safety bugs in Firefox/Thunderbird across Firefox ESR 115.33, ESR 140.8, and Firefox/Thunderbird 148. Some flaws show memory corruption and could be exploitable for arbitrary code with enough effort per the initial entry. The issues were fixed in Firefox 149, Firefo...

CVE-2026-74936

A use-after-free in the JavaScript: WebAssembly component of Firefox/Thunderbird can lead to memory corruption and arbitrary code execution. CVSS 9.8 (network, no auth required). Fixed in Firefox 154, ESR 140.14, ESR 153.1, Thunderbird 154, 140.14, and 153.1; Debian and Slackware packages updated...

CVE-2026-74947

A privilege escalation flaw in Firefox's Graphics component stems from an invalid pointer. CVSS 8.8 (HIGH) rates network attack vector with no privileges required. Fixed in Firefox 154 and Firefox ESR 153.1. No in-the-wild exploitation reported; CISA SSVC marks it non-automatable with total techn...

CVE-2026-74955

Mozilla Firefox's Request Handling component contains a privilege escalation flaw rated CVSS 8.8 (HIGH). Exploitation requires network access and user interaction but no prior privileges, with HIGH impacts to confidentiality, integrity, and availability. No in-the-wild exploitation is reported. R...

CVE-2026-74957

CVE-2026-74957 is a mitigation bypass in the Safe Browsing component of Mozilla Firefox and Thunderbird. The CVSS 3.1 score is 8.1 (HIGH) with a vector of AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N, indicating that a remote attacker can exploit this with low complexity and user interaction to achieve hi...

CVE-2026-8971

The CVE-2026-8971 issue is described across multiple sources as a same-origin policy bypass in the Networking: JAR component, with remediation issued as Firefox 151. The documents do not specify the exact affected product versions beyond Firefox, nor any exploits or in-the-wild use. Root cause de...

CVE-2025-10529

CVE-2025-10529 describes a Same-origin policy bypass in the Firefox/Thunderbird Layout component. The connected sources confirm the vulnerability affects Firefox versions below 143 and Firefox ESR below 140.3, and Thunderbird versions below 143 and below 140.3. The impact is implied by the descri...

CVE-2025-10535

CVE-2025-10535 describes an information-disclosure and mitigation-bypass vulnerability in the Privacy component of Firefox for Android, affecting Firefox versions older than 143. The issue is cited across multiple security feeds and Nessus plugins as part of the Firefox

CVE-2025-13021

CVE-2025-13021 is an active issue affecting Firefox and Thunderbird prior to version 145, caused by incorrect boundary conditions in the Graphics: WebGPU component. Public advisories (mfsa2025-90) reference memory-safety concerns in Firefox/Thunderbird around 144 as context, and Fedora/Mozilla ad...

CVE-2026-0879

CVE-2026-0879 is a sandbox escape in the Graphics component that affects Firefox and Thunderbird prior to certain versions. Concrete details from connected documents show: the vulnerability is described as a Sandbox escape due to incorrect boundary conditions in the Graphics component, affecting ...

CVE-2026-16401

Vulnerability CVE-2026-16401 is a privilege-escalation issue in the Data Loss Prevention component affecting Firefox and Thunderbird. The flaw, classified as high impact (CVSSv3.1: 8.8, CONF/I/H/A), is mitigated by upgrading to Firefox 153 and Thunderbird 153. The CVSS vector indicates network at...

CVE-2026-2803

CVE-2026-2803 affects Mozilla Firefox and Mozilla Thunderbird. The issue is an information disclosure with mitigation bypass in the Settings UI component, fixed in Firefox 148 and Thunderbird 148. Connected advisories confirm affected products and versions, and note remediation to update to the l...

CVE-2026-74952

Mozilla Firefox's Application Update component is affected by a privilege escalation flaw rated CVSS 8.8 (HIGH), exploitable remotely with no privileges but requiring user interaction. The vulnerability allows full confidentiality, integrity, and availability impact. It is fixed in Firefox 154 , ...

CVE-2026-8952

CVE-2026-8952 describes a privilege-escalation issue in the Application Update component. Public documentation consistently states the vulnerability was fixed in Firefox 151 and Thunderbird 151. Affected product scope shown in connected sources includes Mozilla Thunderbird versions earlier than 1...

CVE-2026-8968

Denial-of-service in the Audio/Video: Web Codecs component of Firefox caused by an invalid pointer. Affected product: Firefox WebCodecs; root cause: invalid pointer in the WebCodecs code path. Impact (per CVSS 3.1): HIGH with Availability impact; Attack Vector: NETWORK; Attack Complexity: LOW; Pr...

CVE-2025-11708

CVE-2025-11708 is a use-after-free in MediaTrackGraphImpl::GetInstance() affecting Firefox before version 144, Firefox ESR before 140.4, Thunderbird before 144, and Thunderbird before 140.4. Connected advisories corroborate multiple vendors and distributions addressing these Firefox/Thunderbird m...

CVE-2025-11720

Summary of CVE-2025-11720 : The issue affects Mozilla Firefox (including Firefox for Android) where the Custom Tabs UI only shows the base site hostname, not the full hostname. This can enable user deception when content from a subdomain is hosted to resemble content from another subdomain of the...

CVE-2025-14328

CVE-2025-14328: Privilege escalation in the Netmonitor component affects Firefox and Firefox ESR (Firefox < 146; ESR

CVE-2026-12302

CVE-2026-12302 is a mitigation bypass in the DOM: Security component that has been fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. Multiple advisories and vendor notes confirm the patch exists in these versions. Affected products in the conne...

CVE-2026-12322

CVE-2026-12322 is a clickjacking vulnerability in the Gtk Widget component affecting Mozilla Firefox and Thunderbird. The issue, described across multiple sources, is due to a UI framing/embedding flaw that could enable deceptive UI interaction. Affected products were updated to mitigate the vuln...

CVE-2026-12330

CVE-2026-12330 corresponds to an issue in the Internationalization component with incorrect boundary conditions. Public disclosures in connected advisories confirm multiple Mozilla products are affected, including Firefox ESR and Thunderbird. Debian’s advisory shows the vulnerability affecting fi...

CVE-2026-16353

The CVE-2026-16353 entry concerns Mozilla Firefox/Firefox ESR and the DOM Bindings (WebIDL) component. Affected component: Invalid pointer in the DOM: Bindings (WebIDL). Root cause: invalid pointer handling in the DOM Bindings. Impact: high confidentiality, integrity, and availability (per CVSS 3...

CVE-2026-16380

CVE-2026-16380 describes a mitigation bypass in the Networking component of Mozilla Firefox. The issue is characterized in the sources as a bypass vulnerability that was fixed in Firefox 153. The affected product is Mozilla Firefox; detailed root cause and affected subcomponents are not explicitl...

CVE-2026-16406

CVE-2026-16406: A mitigation bypass in the Networking component was reported for Firefox; the vulnerability is addressed by Firefox 153. The available sources do not specify the exact root cause, affected subcomponents, or exploitation details beyond the fix version. CVSSv3.1 metrics are provided...

CVE-2026-2772

CVE-2026-2772 is a Firefox/Thunderbird memory-safety issue described as a use-after-free in the Audio/Video: Playback component. The vulnerability affects Firefox-related products and was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. Connecte...

CVE-2026-2793

CVE-2026-2793 is a memory-safety issue in Mozilla products (Firefox/Thunderbird) affecting Firefox ESR 115.32, ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. The advisory notes evidence of memory corruption and that, with enough effort, arbitrary code could potentially be exec...

CVE-2026-2794

CVE-2026-2794: Information disclosure due to uninitialized memory in Firefox and Firefox Focus for Android. Affected: Firefox/Firefox Focus for Android; root cause is uninitialized memory. Status: fixed in Firefox 148.0. Remediation: upgrade to Firefox 148 or later (per Mozilla advisory). Practic...

CVE-2026-4693

CVE-2026-4693: Affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR

CVE-2026-4705

CVE-2026-4705 is an undefined-behavior issue in the WebRTC: Signaling component. Public disclosures in the initial document indicate the vulnerability affected Firefox and Thunderbird products, with patches delivered in Firefox 149 / ESR 140.9 and Thunderbird 149 / 140.9. The accompanying connect...

CVE-2026-4707

CVE-2026-4707 is a vulnerability in the Graphics: Canvas2D component caused by incorrect boundary conditions. It affects Firefox (pre-149), Firefox ESR (pre-115.34 and pre-140.9) and is also listed similarly in related advisories. The issue is fixed in Firefox 149 and Firefox ESR 115.34/140.9. If...

CVE-2026-4720

CVE-2026-4720 is a memory-safety issue affecting Mozilla products (Firefox/Thunderbird). Connected advisories confirm memory-corruption-type bugs in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148, and Thunderbird 148, with the practical impact stated as potential arbitrary code execution. ...

CVE-2026-74953

Firefox's Networking: Cookies component has a privilege escalation flaw. Exploitation requires user interaction (CVSS 8.8 HIGH). Patch available in Firefox 154, ESR 140.14, and ESR 153.1. No in-the-wild exploitation reported; root cause not specified in documents.

CVE-2026-74960

CVE-2026-74960 is a site isolation issue in the WebExtensions component of Mozilla Firefox and Thunderbird. The vulnerability allows a web extension to bypass site isolation boundaries, potentially enabling cross-origin data access. It carries a CVSS 3.1 score of 8.1 (HIGH) with a vector of AV:N/...